How can you use jQuery measure how far down the user has scrolled?

Question

I need to change the style of an element after the user has scrolled down beyond a certain number of pixels, and then change it back once the user has scrolled back up. I\'m

Answer 1

This is not working, because mobile phones do not accept .scrollTop() since they use a viewport instead. Thus .scrollTop() will always be 0 on mobile phones. Still looking for the right solution to this, but have not found one.